CN109270341A - Digital signal processing device and electric energy meter for electric energy meter - Google Patents
Digital signal processing device and electric energy meter for electric energy meter Download PDFInfo
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- CN109270341A CN109270341A CN201710585968.9A CN201710585968A CN109270341A CN 109270341 A CN109270341 A CN 109270341A CN 201710585968 A CN201710585968 A CN 201710585968A CN 109270341 A CN109270341 A CN 109270341A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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Abstract
The invention discloses a kind of digital signal processing devices and electric energy meter for electric energy meter, the digital signal processing device includes schema management module, Clock management module and management through quantification module, schema management module is electrically connected with Clock management module and management through quantification module respectively, and Clock management module is electrically connected with management through quantification module；Schema management module controls the switching between at least two kinds of quantitative models, when quantitative model is switched to target quantitative model by schema management module, Clock management module sets system clock according to target quantitative model, and system clock is sent to management through quantification module, management through quantification module measures power index data according to target quantitative model.The present invention can provide the switchings between a variety of quantitative models and a variety of quantitative models, meet the function of measuring of different levels, the needs of performance and power consumption, reduce hardware consumption, reduce power consumption, multiple functional, have excellent performance, improve user experience.
Description
Technical field
The present invention relates to electrical energy measurement field, in particular to a kind of digital signal processing device for electric energy meter and
Electric energy meter.
Background technique
The raising of requirement with the development and market of digital signal processing capability to electric energy meter, Intelligent electric-energy metering
Table has become the mainstream of electric energy meter.Currently, user is more and more to the functional requirement of Intelligent electric-energy metering table, such as simple
On the basis of metering, need to add virtual value metering, reactive measurement, fundamental wave metering, DC measurement and electric energy quality monitoring etc., and
And user is higher and higher to the performance requirement of Intelligent electric-energy metering table, for example bigger measurement range, smaller signal is required to jump
It is dynamic, preferably forward and reverse linear etc..In addition, being wanted with the competition daytime increasingly in metering market to hardware consumption and power consumption
Ask also increasingly harsher, the existing general quantitative model of Intelligent electric-energy metering table is single, can not provide various modes, therefore power consumption
It is higher, in addition, the versatility that user also wants to metering chip is more and more stronger, such as can meet state's net standard and
The requirement of south net, moreover it is possible to do overseas exit list.But to cannot achieve this series of highly difficult for existing Intelligent electric-energy metering table
Requirement.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome in the prior art Intelligent electric-energy metering table quantitative model it is single,
The higher defect of power consumption provides a kind of digital signal processing device and electric energy meter for electric energy meter.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of digital signal processing device for electric energy meter, it is characterized in that, the digital signal processing device
Including schema management module, Clock management module and management through quantification module, the schema management module respectively with the clock pipe
It manages module and management through quantification module electrical connection, the Clock management module is electrically connected with the management through quantification module；
The schema management module is used to control the switching between at least two kinds of quantitative models, when the schema management module
When quantitative model is switched to a target quantitative model, the Clock management module according to the target quantitative model for setting
Determine system clock, and the system clock is sent to the management through quantification module, the management through quantification module is used for basis
The target quantitative model measures power index data.
Preferably, the target quantitative model is normal quantitative model, frequency dividing quantitative model, low-power consumption quantitative model or anti-
Stealing quantitative model；
When quantitative model is switched to the normal quantitative model by the schema management module, the Clock management module
It is set as system clock for receiving the first master clock, and by first master clock；
When quantitative model is switched to the frequency dividing quantitative model by the schema management module, the Clock management module
It is set as system clock for receiving the first master clock, and by first master clock after frequency dividing；
When quantitative model is switched to the low-power consumption quantitative model by the schema management module, the Clock management mould
Block is at least 100 for receiving the second master clock, the ratio of the first master clock frequency and the second master clock frequency, and will be described
Second master clock is set as system clock；
When quantitative model is switched to the electricity stealing preventive metering mode by the schema management module, the management through quantification mould
Block measures power index data according to the preset voltage value for receiving a preset voltage value, the Clock management
Module is for receiving first master clock or second master clock, when receiving first master clock, after frequency dividing
First master clock is set as system clock, when receiving second master clock, second master clock is set as be
System clock.
Preferably, the Clock management module is also used to generate a variety of frequency-dividing clocks and gated clock, the frequency-dividing clock
For the clock divided to the system clock, and frequency-dividing clock and gated clock are sent to the management through quantification mould
Block.
Preferably, the management through quantification module includes waveform metering units, for output-input voltage waveform and input electricity
Flow waveform；
The management through quantification module further include:
DC measurement unit, for exporting DC voltage value and DC current values；And/or
Line voltage frequency measurement unit, the frequency for output-input voltage；And/or
Phase angle metering units, the phase angle for output-input voltage and input current；And/or
Voltage and current peak value metering units, for output-input voltage and the peak value of input current；And/or
Line voltage falls metering units, for detecting that it is default that the absolute value of voltage waveform is less than within continuous several periods
When falling threshold value, output line voltage falls status information；And/or
Quickly and at a slow speed virtual value metering units, for exporting quickly and at a slow speed current effective value and quickly and at a slow speed voltage
Virtual value；And/or
Active all-wave power measurement unit, for exporting active all-wave power meter magnitude；And/or
Active fundamental power metering units, for exporting active fundamental power variable；And/or
Idle fundamental wave or all-wave power measurement unit, for exporting idle fundamental wave or all-wave power meter magnitude；And/or
Apparent energy measures unit, for exporting apparent energy variable；And/or
Power factor measures unit, is used for output power factor variable；And/or
Active all-wave power metering unit, for exporting active all-wave energy value；And/or
Active all-wave forward and reverse power metering unit, for exporting active all-wave forward and reverse energy value；With/
Or,
The active all-wave power metering unit of split-phase, for exporting the active all-wave energy value of split-phase；And/or
Idle fundamental wave or all-wave power metering unit, for exporting idle fundamental wave or all-wave energy value；And/or
Apparent energy metering units, for exporting apparent energy value.
Preferably, the waveform metering units include the first sinc filter (comb filter), the second sinc filter
And HPF (high-pass filter), the extracting multiple of first sinc filter are greater than the extraction times of second sinc filter
Number, first sinc filter and second sinc filter are respectively used to close to the pulse of input current and input voltage
It is down-sampled to spend modulated signal progress, the HPF is used to filter out the direct current and low frequency in down-sampled obtained electric current and voltage waveform
Ingredient.
Preferably, when the management through quantification module includes the quick and virtual value metering units at a slow speed, it is described quick
Virtual value metering units include squaring cell, low-pass filter unit, evolution unit, first integral unit, absolute value list at a slow speed
Member and second integral unit；
It is described that quickly and at a slow speed for virtual value metering units for receiving input current waveform and input voltage waveform, input is electric
Stream waveform and input voltage waveform pass through squaring cell, low-pass filter unit and evolution unit and obtain the wink of current effective value at a slow speed
The instantaneous value of duration and at a slow speed voltage effective value, the at a slow speed instantaneous value of current effective value and the at a slow speed instantaneous value of voltage effective value point
Do not export current effective value at a slow speed and at a slow speed voltage effective value after first integral unit cumulative mean, input current waveform and
Input voltage waveform after absolute value element takes absolute value, by second integral unit half cycle wave period the integral multiple time
Fast current virtual value and quick voltage virtual value are exported after interior cumulative mean.
Preferably, the apparent energy measures unit when the management through quantification module includes apparent energy metering unit
Including multiplying unit and the 6th integral unit；
Apparent energy metering unit is used to receive the instantaneous value of current effective value at a slow speed and at a slow speed voltage effective value
Instantaneous value, by the instantaneous value of current effective value at a slow speed and at a slow speed the instantaneous value of voltage effective value after multiplying unit is multiplied
The instantaneous value of apparent energy is obtained, exports apparent energy variable after the 6th integral cumulative mean.
Preferably, the digital signal processing device further include reset management module, the reset management module respectively with
The schema management module, the Clock management module and the management through quantification module, the reset management module is for distinguishing
The schema management module, the Clock management module and the management through quantification module are resetted.
Preferably, the digital signal processing device further includes state and interrupt management module, the state and interruption are managed
Reason module is electrically connected with the management through quantification module, and the management through quantification module is also used to send materials Unloading Control information of vessel and interrupts class
Type information to the state and interrupt management module, the state and interrupt management module for receive materials Unloading Control information of vessel and in
Disconnected type information, and export metering state mark and external interrupt signal.
Preferably, the digital signal processing device further includes metering register management module, the metering register pipe
Reason module is electrically connected with the schema management module and the management through quantification module respectively；
The management through quantification module is also used to export the power index data to the metering register management module,
The metering register management module for storing the power index data, the metering register management module be also used to by
Calibration signal is sent to the management through quantification module, and control signal is respectively sent to the schema management module and the metering
Management module.
Preferably, the digital signal processing device further includes communication interface modules, the communication interface modules is UART
(Universal Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter) interface, SPI
(Serial Peripheral Interface, Serial Peripheral Interface (SPI)) interface, I2C (Inter-Integrated Circuit,
A kind of bidirectional two-line synchronous serial bus) interface, APB bus (Advanced Peripheral Bus, On-Chip peripheral bus)
Interface or ahb bus (Advanced High performance Bus, high performance bus) interface, the communication interface modules
It is electrically connected with the metering register management module, the communication interface modules is for reading and writing data.
A kind of electric energy meter, it is characterized in that, the electric energy meter includes such as above-mentioned digital signal processing device.
Preferably, the electric energy meter is single-phase intelligent electric energy meter or three-phase intelligent electric energy meter.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
The present invention can provide the switchings between a variety of quantitative models and a variety of quantitative models, meet the metering function of different levels
The needs of energy, performance and power consumption reduce hardware consumption, reduce power consumption, multiple functional, have excellent performance, improve user experience.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the digital signal processing device for electric energy meter of present pre-ferred embodiments.
Fig. 2 is the structural schematic diagram of the waveform metering units of present pre-ferred embodiments.
Fig. 3 is quick and virtual value metering units at a slow speed the structural schematic diagram of present pre-ferred embodiments.
Fig. 4 is the structural schematic diagram of the active all-wave power measurement unit of present pre-ferred embodiments.
Fig. 5 is the structural schematic diagram of the active fundamental power metering units of present pre-ferred embodiments.
Fig. 6 is the idle fundamental wave of present pre-ferred embodiments or the structural schematic diagram of all-wave power measurement unit.
Fig. 7 is that the apparent energy of present pre-ferred embodiments measures the structural schematic diagram of unit.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
As shown in Figure 1, the digital signal processing device provided in this embodiment for electric energy meter includes schema management
Module 1, Clock management module 2 reset management module 3, management through quantification module 4, state and interrupt management module 5, metering deposit
Device management module 6 and communication interface modules 7, schema management module 1 respectively with Clock management module 2, management through quantification module 4 and meter
It measures register management module 6 to be electrically connected, Clock management module 2 is electrically connected with management through quantification module 4, state and interrupt management module
5 respectively with management through quantification module 4 and metering register management module 6 be electrically connected, measure register management module 6 respectively with metering
Management module 4 and communication interface modules 7 are electrically connected, reset management module 3 respectively with schema management module 1, Clock management module
2, management through quantification module 4, state and interrupt management module 5, metering register management module 6 and communication interface modules 7 are electrically connected
(the not specifically illustrated electrical connection for resetting management module 3 in Fig. 1).
Specifically, schema management module 1 is used to control the switching between 4 kinds of quantitative models, whenever schema management module will
When quantitative model is converted to a target quantitative model, schema management module is defeated by the information difference for characterizing the target quantitative model
Out to Clock management module and management through quantification module.In the present embodiment, the target quantitative model is normal quantitative model, divides
Frequency quantitative model, low-power consumption quantitative model or electricity stealing preventive metering mode, but quantitative model is not limited specifically, it can be according to user's
Demand and actual conditions are adjusted correspondingly.
When quantitative model is switched to the normal quantitative model by schema management module, Clock management module is for receiving
First master clock, and first master clock is set as system clock, in the present embodiment, the first master clock frequency is
4MHz, but it is not limited to this numerical value, at this point, the digital signal processing device provides highest work clock, Ji Hukai
All functions, and best performance are opened, but power consumption is maximum, for stringent to measuring requirement and be under power supply power supply scene.
When quantitative model is switched to the frequency dividing quantitative model by schema management module, Clock management module is for receiving
First master clock, and first master clock after frequency dividing is set as system clock, divider ratio can be according to user's reality
Border demand is selected, and does not limit divider ratio in the present embodiment specifically, divider ratio is bigger, it is possible to provide function it is fewer, performance
It is poorer, but power consumption is with regard to smaller, for relatively not stringent to measuring requirement and need to reduce under the scene of energy consumption.
When quantitative model is switched to the low-power consumption quantitative model by schema management module, Clock management module is for connecing
Receive the second master clock, the ratio of the first master clock frequency and the second master clock frequency is at least 100, and by described second it is main when
Clock is set as system clock, and in the present embodiment, the second master clock frequency is 32KHz, but is not limited to this numerical value, this
When, system clock is the clock for being much smaller than the first master clock frequency, provides minimum work clock, closes most of function
Can, simple metering is only provided, performance is worst, but micro power consumption, simply measures for only needing to provide and is battery power supply
Under occasion.
When quantitative model is switched to the electricity stealing preventive metering mode by schema management module, management through quantification module is for connecing
A preset voltage value is received, and measures power index data according to the preset voltage value, Clock management module is for receiving
First master clock or second master clock, when receiving first master clock, when described first after frequency dividing is main
Clock is set as system clock, when receiving second master clock, second master clock is set as system clock, in this reality
Apply in example, the electricity stealing preventive metering mode selectively operating under the frequency dividing quantitative model or the low-power consumption quantitative model,
When the zero curve of electric energy meter is connected to ground by stealing user, the signal of voltage channel is almost nil, therefore voltage path is no longer
Metering, at this point, electric energy meter is used for power and energy balane by register configuration voltage value, to realize normal electric energy
Metering, it might even be possible to punish stealing user.
Clock management module 2 is for generating a variety of frequency-dividing clocks and gated clock, it is therefore an objective to reduce hardware consumption and power consumption,
The frequency-dividing clock is the clock divided to the system clock, and frequency-dividing clock and gated clock are sent to metering
Management module.Under normal quantitative model, with frequency-dividing clock handle it is down-sampled after signal, frequency-dividing clock can reduce clock overturning
With the frequency of d type flip flop overturning, to reduce power consumption, frequency-dividing clock also can be reduced cumulative equal operation times, reduce data bit width,
To reduce hardware consumption, gated clock is used for the module for needing to make can control, can reduce power consumption；It divides under quantitative model, the
One master clock is used as system clock again after first dividing, then generate corresponding frequency-dividing clock and gated clock again；Low-power consumption metering
Under mode, since the clock that system clock is a very low frequency needs to adjust the frequency dividing of frequency-dividing clock to guarantee metering performance
Than can not enable more modules with gated clock since the function that system needs to measure at this time is seldom.
It resets management module 3 and is used for generation system reset signal and multiple module reset signal, systematic reset signal can answer
All modules in the system of position, module resets signal are used to reset corresponding module, overturn the signal in module no longer, thus
Realize the purpose for reducing power consumption.
Management through quantification module 4 includes waveform metering units 401, DC measurement unit 402, line voltage frequency measurement unit
403, phase angle metering units 404, voltage and current peak value metering units 405, line voltage fall metering units 406, quickly and
Virtual value metering units 407, active all-wave power measurement unit 408, active fundamental power metering units 409, idle base at a slow speed
Wave or all-wave power measurement unit 410, apparent energy metering unit 411, power factor measure unit 412, active all-wave energy
Metering units 413, active all-wave forward and reverse power metering unit 414, the active all-wave power metering unit 415 of split-phase, nothing
Function fundamental wave or all-wave power metering unit 416 and apparent energy metering units 417, it is in the present embodiment, not specific to limit respectively
The function and quantity of a metering units, each metering units can be designed according to user demand.
Specifically, waveform metering units 401 are used for output-input voltage waveform and input current waveform.As shown in Fig. 2, wave
Shape metering units include the first sinc filter 4011, the second sinc filter 4012 and HPF4013, and input current and input are electric
An I_PDM/V_PDM code (pulse density modulated signals) is pressed to first pass through the first sinc filter 4011 or the second sinc filter
4012 progress are down-sampled, then filter out direct current and low-frequency component by HPF4013, to export low speed long number waveform signal
(I_WAVE,V_WAVE).Under low-power consumption quantitative model, the second sinc filter 4012 is selected, under other quantitative models, selection
First sinc filter 4011, wherein under low-power consumption quantitative model, since system clock is very low, in order to guarantee metering essence
Degree, down-sampled multiple cannot be too low, therefore the extracting multiple of the first sinc filter 4011 is greater than the second sinc filter 4012
Extracting multiple.
DC measurement unit 402, for exporting DC voltage value and DC current values.What waveform metering units 401 exported
I_WAVE and V_WAVE first passes through the fundamental wave that notch filter filters out 50Hz or 60Hz, after taking absolute value, according to the time of setting
Cumulative mean is carried out, DC meter magnitude is exported, is harmonic components obtained by DC measurement if HPF high-pass filter 4013 is opened, if
It closes, adds harmonic components for direct current.Under frequency dividing quantitative model and low-power consumption quantitative model, the characteristic of notch filter has changed
Become, direct current no longer measures.
Line voltage frequency measurement unit 403, the frequency for output-input voltage.Based on system clock, by counting electricity
The sampling number between zero passage, conversion obtain the frequency of input voltage signal, system clock to corrugating V_WAVE forward or backwards
Frequency is lower, and sampling number is fewer, and precision is poorer.Under electricity stealing preventive metering mode, without effective input voltage, line voltage frequency
Rate is no longer measured.
Phase angle metering units 404, the phase angle for output-input voltage and input current.Based on system clock, lead to
It crosses and counts positive voltage waveform and current waveform forward direction or the reversed sampled point between the reversed zero passage of current waveform of voltage waveform
Number, conversion obtain the angle of input current and voltage signal, and system clock frequency is lower, and sampling number is fewer, and precision is poorer.?
Under electricity stealing preventive metering mode, without effective input voltage, phase angle is no longer measured.
Voltage and current peak value metering units 405, for output-input voltage and the peak value of input current.Calculate voltage and
Maximum value of the absolute value of current waveform in half cycle wave period, every zero passage is primary, and peak value updates primary.In electricity stealing preventive metering mould
Under formula, without effective input voltage, voltage peak is no longer measured.
Line voltage falls metering units 406, for detecting that the absolute value of voltage waveform is less than within continuous several periods
Default when falling threshold value, output line voltage falls status information, and the line voltage falls status information characterization line voltage and falls shape
State.Under electricity stealing preventive metering mode, without effective input voltage, line voltage frequency is no longer measured.
Quickly and at a slow speed virtual value metering units 407, for exporting quickly and at a slow speed current effective value and quickly and at a slow speed
Voltage effective value.As shown in figure 3, quickly and at a slow speed, virtual value metering units include squaring cell 4071, low-pass filter unit
4072, evolution unit 4073, first integral unit 4074, absolute value element 4075 and second integral unit 4076, it is quickly and slow
Fast virtual value metering units are for receiving input current waveform and input voltage waveform, input current waveform and input voltage waveform
The instantaneous value of current effective value at a slow speed and slow is obtained by squaring cell 4071, low-pass filter unit 4072 and evolution unit 4073
The instantaneous value (I_RMS_t and V_RMS_t) of fast voltage effective value, the at a slow speed instantaneous value of current effective value and at a slow speed voltage effective value
Instantaneous value current effective value at a slow speed and at a slow speed voltage effective value are exported after 4074 cumulative mean of first integral unit respectively
(I_RMS and V_RMS), input current waveform and input voltage waveform are after absolute value element 4075 takes absolute value, by
Two integral units 4076 export fast current virtual value and fast electric within the integral multiple time of half cycle wave period after cumulative mean
It is pressed with valid value (I_FAST_RMS and V_FAST_RMS).At a slow speed virtual value bounce and linearly than be quickly and effectively worth come it is good,
But stablizing the time is not worth quickly and effectively short, and especially under low-power consumption quantitative model, clock frequency is very low, and virtual value is steady at a slow speed
It fixes time and is far longer than fast and effective value, the common quickly and effectively value of user quickly judges roughly the size of signal.
Active all-wave power measurement unit 408, for exporting active all-wave power meter magnitude.As shown in figure 4, active all-wave
Power measurement unit includes multiplying unit 4081, the first LPF_WATT4082 and third integral unit 4083, input current and defeated
Enter voltage waveform signal by multiplying unit and the first LPF_WATT low-pass filter filter out radio-frequency component (it is mainly secondary and with
Upper fractional harmonic part), active all-wave power instantaneous value is obtained, is had after third integral unit long-time cumulative mean
Function all-wave power meter magnitude (WATT).Under electricity stealing preventive metering mode, without effective input voltage, active all-wave power is no longer
Metering.
Active fundamental power metering units 409, for exporting active fundamental power variable.As shown in figure 5, active all-wave
Power measurement unit includes LPF_FWAVE4091, multiplying unit 4092, the 2nd LPF_WATT4093 and the 4th integral unit
4094, input current and input voltage waveform signal filter out harmonic component (master by LPF_FWAVE fundamental wave filter respectively first
If three times and above section harmonic), after obtained fundamental waveform signal (I_FWAVE, V_FWAVE), pass through be multiplied it is single
Member, the 2nd LPF_WATT low-pass filter filter out radio-frequency component (mainly secondary and above section harmonic), obtain active
Fundamental power instantaneous value obtains active fundamental power variable (FWATT) after the 4th integral unit long-time cumulative mean.
Under electricity stealing preventive metering mode, without effective input voltage, active fundamental power is no longer measured.
Idle fundamental wave or all-wave power measurement unit 410, for exporting idle fundamental wave or all-wave power meter magnitude.Such as Fig. 6
Shown, idle fundamental wave or all-wave power measurement unit include Hilbert I4101, HilbertV4102, multiplying unit 4103,
The fundamental waveform signal of three LPF_WATT4104 and the 5th integral unit 4105, input current and input voltage waveform signal is complete
Wave signal, Hilbert I hilbert filter and Hilbert V hilbert filter, make the phase of the two respectively
90 degree of difference, then passes through that multiplying unit, that the 3rd LPF_WATT low-pass filter filters out radio-frequency component is (mainly secondary or more
Fractional harmonic part), active reactive fundamental wave or all-wave power instantaneous value are obtained, by the 5th integral unit long-time cumulative mean
After obtain idle fundamental wave or all-wave power meter magnitude (VAR).Under electricity stealing preventive metering mode, without effective input voltage, nothing
Function fundamental wave or all-wave power no longer measure.
Apparent energy measures unit 411, for exporting apparent energy variable.As shown in fig. 7, apparent energy measures unit
Including multiplying unit 4111 and the 6th integral unit 4112, the at a slow speed instantaneous value (I_RMS_t) of current effective value and at a slow speed voltage
The instantaneous value (V_RMS_t) of virtual value obtains the instantaneous value of apparent energy after multiplying unit is multiplied, by the 6th product
Apparent energy variable (VA) is obtained after sub-unit long-time cumulative mean.Under electricity stealing preventive metering mode, match for register
Set a voltage constant (V_CONST) as V_RMS_t use, when V_CONST be configured to one it is biggish several when, amplification metering
Electric energy, punish stealing user.
Power factor measures unit 412, is used for output power factor variable.Active all-wave power meter magnitude (WATT) is removed
Power factor variable is obtained with apparent energy variable (VA).Under electricity stealing preventive metering mode, without effective input voltage,
Power factor is no longer measured.
Active all-wave power metering unit 413, for exporting active all-wave energy value.The instantaneous value of active all-wave power into
Row integral is cumulative, reaches the threshold value of setting, generates an active all-wave electrical energy pulse.In the case where dividing quantitative model, when system
Clock frequency is lower, and integration step is bigger, and pulse error is bigger；Under electricity stealing preventive metering mode, without effective input voltage, have
Function all-wave energy no longer measures.
Active all-wave forward and reverse power metering unit 414, for exporting active all-wave forward and reverse energy value.Have
Function all-wave forward and reverse instantaneous value carries out integral respectively and adds up, and reaches the threshold value of setting, produces electricl energy pulse respectively.Dividing
Under frequency quantitative model, system clock frequency is lower, and integration step is bigger, and pulse error is bigger；Under electricity stealing preventive metering mode, do not have
There is effective input voltage, active all-wave forward and reverse energy all no longer measures.
The active all-wave power metering unit 415 of split-phase, for exporting the active all-wave energy value of split-phase.Every mutually active all-wave function
The instantaneous value of rate carries out integral respectively and adds up, and reaches the threshold value of setting, produces electricl energy pulse respectively.In frequency dividing quantitative model
Under, system clock frequency is lower, and integration step is bigger, and pulse error is bigger；Under electricity stealing preventive metering mode, without effective defeated
Enter voltage, the active all-wave energy of split-phase no longer measures.
Idle fundamental wave or all-wave power metering unit 416, for exporting idle fundamental wave or all-wave energy value.Idle fundamental wave or
Person's all-wave power instantaneous value carries out integral and adds up, and reaches the threshold value of setting, generates idle fundamental wave or all-wave energy pulse.?
It divides under quantitative model, system clock frequency is lower, and integration step is bigger, and pulse error is bigger；Under electricity stealing preventive metering mode,
There is no effective input voltage, idle fundamental wave or all-wave energy no longer measure.
Apparent energy metering units 417, for exporting apparent energy value.Apparent energy instantaneous value carries out integral and adds up, and reaches
To the threshold value of setting, a view is generated in electrical energy pulse.In the case where dividing quantitative model, system clock frequency is lower, integration step
Length is bigger, and pulse error is bigger；Under electricity stealing preventive metering mode, V_CONST is configured to a constant and works as voltage value, can produce electricity
Energy impulse.
State and interrupt management module 5 are used to receive materials Unloading Control information of vessel and interrupt type information from management through quantification module,
Materials Unloading Control information of vessel based on input after being further processed, updates corresponding metering state register, type needed for generating outside
Interruption.
Metering register management module 6 includes that calibration register, control register, metering value register and metering state are posted
Storage.Calibration register exports calibration signal and gives management through quantification module, and control register output control signal is respectively sent to mould
Formula management module and management through quantification module, are written by communication interface modules 7, the variable that is received from management through quantification module and from
The metering state value that state and interrupt management module receive is stored respectively to metering value register and metering state register, and
It is read by communication interface modules 7.
Communication interface modules 7 is the interface that user interacts with metering register management module 6, for reading and writing data, interface
Type can flexible choice, in the present embodiment, communication interface modules is that UART interface, SPI interface, I2C interface, APB bus connect
Mouth or ahb bus interface, but interface type is not limited specifically, it can voluntarily be selected according to user demand.
In the present embodiment, schema management module provides a variety of quantitative models, meets function of measuring, the performance of different levels
With the needs of power consumption；Clock management module generates frequency-dividing clock and gated clock based on different quantitative model selections, to drop
Low-power consumption and hardware consumption；The functional module that management module cannot can not reset enabledly is resetted, power consumption can be reduced；Management through quantification module mentions
A variety of function of measuring have been supplied, can meet the needs of different user, can also have been transplanted by module and function cutting meets specific need
It asks；State and interrupt management module can provide the monitoring and external interrupt of a variety of metering states；Measuring register management module can
A variety of metrical informations and control information are provided；In addition, user can the different types of communication interface type of flexible choice.
Digital signal processing device provided in this embodiment is commonly used in Multifunctional single-phase Intelligent electric-energy metering table, can pass through
Function cutting is used for simple single-phase intelligent electric energy meter, and complicated three-phase intelligent electric energy meter can be used for by Function Extension,
It can also specifically be needed to carry out customizing functions according to user.In addition, digital signal processing device provided in this embodiment can be used for
Domestic state's netlist and southern netlist scheme, can also do overseas table scheme.
The present embodiment also provides a kind of electric energy meter, and the electric energy meter includes that above-mentioned Digital Signal Processing such as fills
It sets.The electric energy meter is single-phase intelligent electric energy meter or three-phase intelligent electric energy meter.
The present invention can provide the switchings between a variety of quantitative models and a variety of quantitative models, meet the metering function of different levels
The needs of energy, performance and power consumption reduce hardware consumption, reduce power consumption, multiple functional, have excellent performance, improve user experience.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (13)
1. a kind of digital signal processing device for electric energy meter, which is characterized in that the digital signal processing device packet
Include schema management module, Clock management module and management through quantification module, the schema management module respectively with the Clock management
Module and management through quantification module electrical connection, the Clock management module are electrically connected with the management through quantification module；
The schema management module is used to control the switching between at least two kinds of quantitative models, when the schema management module will be counted
When amount pattern switching is a target quantitative model, the Clock management module for being to set according to the target quantitative model
System clock, and the system clock is sent to the management through quantification module, the management through quantification module is used for according to
Target quantitative model measures power index data.
2. digital signal processing device as described in claim 1, which is characterized in that the target quantitative model is normal metering
Mode, frequency dividing quantitative model, low-power consumption quantitative model or electricity stealing preventive metering mode；
When quantitative model is switched to the normal quantitative model by the schema management module, the Clock management module is used for
The first master clock is received, and first master clock is set as system clock；
When quantitative model is switched to the frequency dividing quantitative model by the schema management module, the Clock management module is used for
The first master clock is received, and first master clock after frequency dividing is set as system clock；
When quantitative model is switched to the low-power consumption quantitative model by the schema management module, the Clock management module is used
In receiving the second master clock, the ratio of the first master clock frequency and the second master clock frequency is at least 100, and by described second
Master clock is set as system clock；
When quantitative model is switched to the electricity stealing preventive metering mode by the schema management module, the management through quantification module is used
In receiving a preset voltage value, and power index data are measured according to the preset voltage value, the Clock management module
For receiving first master clock or second master clock, when receiving first master clock, described in after frequency dividing
First master clock is set as system clock, when receiving second master clock, when second master clock is set as system
Clock.
3. digital signal processing device as described in claim 1, which is characterized in that the Clock management module is also used to generate
A variety of frequency-dividing clocks and gated clock, the frequency-dividing clock are the clock divided to the system clock, and will frequency dividing
Clock and gated clock are sent to the management through quantification module.
4. digital signal processing device as described in claim 1, which is characterized in that the management through quantification module includes waveform meter
Unit is measured, output-input voltage waveform and input current waveform are used for；
The management through quantification module further include:
DC measurement unit, for exporting DC voltage value and DC current values；And/or
Line voltage frequency measurement unit, the frequency for output-input voltage；And/or
Phase angle metering units, the phase angle for output-input voltage and input current；And/or
Voltage and current peak value metering units, for output-input voltage and the peak value of input current；And/or
Line voltage falls metering units, for detecting that the absolute value of voltage waveform is less than default fall within continuous several periods
When threshold value, output line voltage falls status information；And/or
Quickly and at a slow speed virtual value metering units, for exporting quickly and at a slow speed current effective value and quickly and at a slow speed voltage is effective
Value；And/or
Active all-wave power measurement unit, for exporting active all-wave power meter magnitude；And/or
Active fundamental power metering units, for exporting active fundamental power variable；And/or
Idle fundamental wave or all-wave power measurement unit, for exporting idle fundamental wave or all-wave power meter magnitude；And/or
Apparent energy measures unit, for exporting apparent energy variable；And/or
Power factor measures unit, is used for output power factor variable；And/or
Active all-wave power metering unit, for exporting active all-wave energy value；And/or
Active all-wave forward and reverse power metering unit, for exporting active all-wave forward and reverse energy value；And/or
The active all-wave power metering unit of split-phase, for exporting the active all-wave energy value of split-phase；And/or
Idle fundamental wave or all-wave power metering unit, for exporting idle fundamental wave or all-wave energy value；And/or
Apparent energy metering units, for exporting apparent energy value.
5. digital signal processing device as claimed in claim 4, which is characterized in that the waveform metering units include first
The extracting multiple of sinc filter, the second sinc filter and HPF, first sinc filter are filtered greater than the 2nd SINC
The extracting multiple of wave device, first sinc filter and second sinc filter are respectively used to input current and input
The pulse density modulated signals progress of voltage is down-sampled, and the HPF is for filtering out in down-sampled obtained electric current and voltage waveform
Direct current and low-frequency component.
6. digital signal processing device as claimed in claim 4, which is characterized in that when the management through quantification module includes described
Quickly and at a slow speed when virtual value metering units, described quickly and at a slow speed virtual value metering units include squaring cell, low-pass filtering
Unit, evolution unit, first integral unit, absolute value element and second integral unit；
It is described that quickly and at a slow speed virtual value metering units are used to receive input current waveform and input voltage waveform, input current wave
Shape and input voltage waveform pass through squaring cell, low-pass filter unit and evolution unit and obtain the instantaneous value of current effective value at a slow speed
And the instantaneous value of voltage effective value at a slow speed, the instantaneous value of the current effective value and instantaneous value of voltage effective value passes through respectively at a slow speed at a slow speed
Current effective value at a slow speed and at a slow speed voltage effective value, input current waveform and input are exported after crossing first integral unit cumulative mean
Voltage waveform tires out within the integral multiple time of half cycle wave period after absolute value element takes absolute value, by second integral unit
Fast current virtual value and quick voltage virtual value are exported after adding averagely.
7. digital signal processing device as claimed in claim 6, which is characterized in that when the management through quantification module includes that view exists
When power measurement unit, the apparent energy metering unit includes multiplying unit and the 6th integral unit；
Apparent energy metering unit is used to receive the instantaneous of the instantaneous value of current effective value at a slow speed and voltage effective value at a slow speed
Value, the instantaneous value of voltage effective value obtains after multiplying unit is multiplied by the instantaneous value of current effective value at a slow speed and at a slow speed
The instantaneous value of apparent energy exports apparent energy variable after the 6th integral cumulative mean.
8. the digital signal processing device as described in any one of claim 1~7, which is characterized in that the digital signal
Processing unit further include reset management module, the reset management module respectively with the schema management module, the clock pipe
Module and the management through quantification module are managed, the reset management module is used for respectively to the schema management module, the clock
Management module and the management through quantification module are resetted.
9. the digital signal processing device as described in any one of claim 1~7, which is characterized in that the digital signal
Processing unit further includes state and interrupt management module, and the state and interrupt management module are electrically connected with the management through quantification module
It connects, the management through quantification module is also used to send materials Unloading Control information of vessel and interrupt type information to the state and interrupt management mould
Block, the state and interrupt management module export metering state for receiving materials Unloading Control information of vessel and interrupt type information
Mark and external interrupt signal.
10. the digital signal processing device as described in any one of claim 1~7, which is characterized in that the digital signal
Processing unit further include metering register management module, the metering register management module respectively with the schema management module
And the management through quantification module electrical connection；
The management through quantification module is also used to export the power index data to the metering register management module, described
For storing the power index data, the metering register management module is also used to calibration metering register management module
Signal is sent to the management through quantification module, and control signal is respectively sent to the schema management module and the management through quantification
Module.
11. digital signal processing device as claimed in claim 10, which is characterized in that the digital signal processing device also wraps
Communication interface modules is included, the communication interface modules is that UART interface, SPI interface, I2C interface, APB bus interface or AHB are total
Line interface, the communication interface modules are electrically connected with the metering register management module, and the communication interface modules is for reading
Write data.
12. a kind of electric energy meter, which is characterized in that the electric energy meter includes such as any one of claim 1~11
The digital signal processing device.
13. electric energy meter as claimed in claim 12, which is characterized in that the electric energy meter is single-phase intelligent electric energy meter
Scale or three-phase intelligent electric energy meter.
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